// The MIT License (MIT)
//
// Copyright (c) 2013-2019 Khan Academy and other contributors
// Copyright (c) 2020 znjameswu <znjameswu@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

part of katex_base;

const _horizBraceEntries = {
  ['\\overbrace', '\\underbrace']:
      FunctionSpec(numArgs: 1, handler: _horizBraceHandler),
};

GreenNode _horizBraceHandler(TexParser parser, FunctionContext context) {
  final base = parser.parseArgNode(mode: null, optional: false)!;
  final scripts = parser.parseScripts();
  var res = base;
  if (context.funcName == '\\overbrace') {
    res = AccentNode(
      base: res.wrapWithEquationRow(),
      label: '\u23de',
      isStretchy: true,
      isShifty: false,
    );
    if (scripts.superscript != null) {
      res = OverNode(
        base: res.wrapWithEquationRow(),
        above: scripts.superscript!,
      );
    }
    if (scripts.subscript != null) {
      res = UnderNode(
        base: res.wrapWithEquationRow(),
        below: scripts.subscript!,
      );
    }
    return res;
  } else {
    res = AccentUnderNode(
      base: res.wrapWithEquationRow(),
      label: '\u23df',
    );
    if (scripts.subscript != null) {
      res = UnderNode(
        base: res.wrapWithEquationRow(),
        below: scripts.subscript!,
      );
    }
    if (scripts.superscript != null) {
      res = OverNode(
        base: res.wrapWithEquationRow(),
        above: scripts.superscript!,
      );
    }
    return res;
  }
}
